Chinese computer hackers are allegedly breaking into high-security networks in the U.S. and other countries. Is Beijing creating an army of Internet warriors?

Tan Dailin lets out an audible gasp when he is told that he was identified in the U.S. as someone who may have been responsible for recent security breaches at the Pentagon. "Will the FBI send special agents out to arrest me?" he asks. Much as they might want to talk with him, though, FBI agents don't have jurisdiction in Chengdu, the capital of China's Sichuan province, where Tan lives. And given that he has been lauded in China's official press for his triumphs in military-sponsored hacking competitions, Tan is unlikely to have problems with local law enforcement. But Tan and...